YNO Telegram Bot v1.4.0 - Collage Inventory Upgrade
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1) Replace only bot.php with the new file.
2) Keep your existing yno_bot.sqlite file. Do not delete it.
3) Copy your BOT_TOKEN, ADMIN_IDS, SETUP_KEY, WEBHOOK_SECRET and WEBHOOK_URL values into the configuration section of the new bot.php.
4) The database migrates automatically and adds photo/caption/collage metadata columns.
5) Your host must have either the PHP Imagick extension or the PHP GD extension for automatic collage creation.
6) Albums registered after upgrading are displayed as one collage photo with the original caption and the inline order button underneath.
7) Existing albums remain usable through the legacy display path. Re-register an old album once if you want it converted to collage mode.
8) The first display downloads and creates the collage. Telegram's resulting file_id is cached, so later displays are fast.
9) Check collage support at: bot.php?health=YOUR_SETUP_KEY (field: collage_engine).